一种用于临床X射线束的便携式康普顿光谱仪，能量范围为20 - 150keV。

A portable Compton spectrometer for clinical X-ray beams in the energy range 20-150 keV.

作者信息

Vieira A A, Linke A, Yoshimura E M, Terini R A, Herdade S B

机构信息

Departamento de Física, Pontifícia Universidade Católica de São Paulo, Rua Marquês de Paranaguá, 111-01303-050 São Paulo, SP, Brazil.

出版信息

Appl Radiat Isot. 2011 Feb;69(2):350-7. doi: 10.1016/j.apradiso.2010.10.011. Epub 2010 Oct 20.

DOI:10.1016/j.apradiso.2010.10.011

PMID:21074445

Abstract

Primary beam spectra were obtained for an X-ray industrial equipment (40-150 kV), and for a clinical mammography apparatus (25-35 kV) from beams scattered at angles close to 90°, measured with a CdTe Compton spectrometer. Actual scattering angles were determined from the Compton energy shift of characteristic X-rays or spectra end-point energy. Evaluated contribution of coherent scattering amounts to more than 15% of fluence in mammographic beams. This technique can be used in clinical environments.

摘要

使用碲化镉康普顿光谱仪，从接近90°角散射的光束中获取了X射线工业设备（40 - 150 kV）和临床乳腺摄影设备（25 - 35 kV）的原射线光谱。实际散射角由特征X射线的康普顿能量位移或光谱端点能量确定。在乳腺摄影光束中，评估得出相干散射的贡献占注量的15%以上。该技术可用于临床环境。